第38卷第3期 2017年6月
文章编号：10013873(2017)03-0281-08
新疆石油地
质
XINJIANG PETROLEUM GEOLOGY DOI:10.7657/XJPG20170305
Vol. 38,No.3 Jun.2017
准噶尔盆地中拐凸起佳木河组沸石类胶结砂砾岩
储集层成因机理吴和源，唐勇”，常秋生”
（1.中国石油勘探开发研究院博士后流动站，北京100083；2.中国石油新疆油田分公司a博士后工作站；
b.勘探开发研究院，新疆克拉玛依834000）
要：沸石类胶结砂砾著储集层成因机理不明是当前中拐凸起二叠系佳木河组油气勘探面的关健间题，以岩心摘
观寨为基础，显微镜下分析为辅助，结合电子探针等微区地化测试方法，基于沉积相与成岩作用分析，建立沉积环境成岩环境与储集层成因之间的相互关系，探讨了准噶尔盐地中拐凸起佳木河组砂砾岩储集层成因机理。佳木河组砂砾岩表现为低孔低渗的致密型储集物性特点，其成因可归纳为4点：①特殊冲积扇沉积环境市控，是多类型岩相形成的基础；②短暂开放性碱性成岩环境诱导，为早期广泛沸石类胶结提供形成环境；③快速多次酸性-碱性成岩环境交替，是次生孔形成的关键；④长期封闭型碱性成岩环境主导，是储集层致密化的重要原因。以洪冲积扇扇缘一扇中亚相为主的佳本河组，6种沉积激相与多种成岩作用共同响应，形成4种涛石类胶结砂砾卷岩相，粗粒径-中等压实-中强胶结-溶蚀成考相在冲积扇扇缘水下分流河道微相的控制下形成区域范围最为有利的储集层类型，将是后续油气期探的重点关注目标。
关键词：准噶尔盐地；中拐凸起：佳木河组；沸石；胶结作用；砂碳岩储集层；因机理
中图分类号：TE112.221
文献标识码：A
Genesis of Sandy ConglomerateReservoirs Cemented byZeolites in JiamuheFormation of
ZhongguaiSwell,JunggarBasin
WU Heyuan', TANG Yong", CHANG Qiusheng”
(1.Postdoctoral Program, Research Institute of Petroleum Exploration and Development, PetroChina, Beijing 100083, China; 2.PetroChina Xinjiang Oilfield Company, a.Postdoctoral Workstation; b.Research Institute of Exploration and Development, Karamay,
Xinjiang 834000, China)
Abstract: The genesis of sandy conglomerate reservoirs cemented by zeolites is the key problem in the exploration of Permian Jiamuhe for-mation in Zhongguai swell, Junggar basin, Based on core observation and microscopic analysis, and combined with electron probe micro-analysis, the paper analyzes the sedimentary facies and diagenesis, establishes the relationships among sedimentary environment, diagenet-ic environment and reservoir genesis, and discusses the genesis and mechanism of sandy conglomerate reservoirs of Jiamuhe formation in Zhongguai swell, Junggar basin. The sandy conglomerate reservoirs of Jiamuhe formation show some characteristics of tight reservoirs with low porosity and low permeability and the genesis of the reservoirs can be summarized as 4 points. First, a special sedimentary environment of alluvial fan was the basis of multi-type lithofacies formation, Second, the induction of ephemerally open and alkaline diagenetic environ-ment provided the environment for the early zeolite cementation. Third, multiple and rapid altemation of acid and alkaline diagenetic envi-ronments was the key factor of secondary pore formation. Fourth, the long-term and enclosed alkaline environment was the most important reason for the densification of reservoirs. The sedimentary facies of Jiamuhe formation is dominated by fan-margin subfaciesmid-fan subfa-cies of pluvial-alluvial fan, and 4 types of sandy conglomerates cemented by zeolites formed under the combined actions of 6 sedimentary facies and multiple diagenesis. The reservoirs with the lithofacies of coarse grained-medium compaction-medium cementation-medium to strong cementation-dissolution under the control of underwater distributary channel of alluvial fan margin will be the most favorable reser-voirs regionally, which will be thekey targets for future petroleum exploration.
Keywords: Junggar basin; Zhongguai swell; Jiamuhe formation; zeolite; cementation; sandy conglomerate reservoir; genetic mechanism
准噶尔盆地是中国西部的一个典型大型叠合含油气盆地"-，西北缘作为前陆盆地山前冲断区，是区域油气的主要富集区，中拐凸起区二叠系中深层砂砾
收稿日期：2017-04-10
修订日期：2017-05-05
岩储集层的油气勘探更是近年来的热点。准噶尔盆地西北缘二叠系砂砾岩储集层具有平面分布广、纵向厚度大、成藏条件优越的特点，储集层以成因类型多
基金项目：国家油气重大专项（2016ZX05047001-004）
作者简介：吴和源（1986-），男，贵州仁怀人，T程师，博士后，沉积学，（Tel)15009906540(Email)wuheyuan0702@126.com 万方数据